hovey



(No Model.) 2 Sheets-Shet 1.

G. P. HOVEY & -D. T. PERKINS.

AUTOMATIC MIXING GOVERNOR FORHYDROGARBON .GAS MACHINES.

No. 304,199. gyjatemed11119251884.

Q I \TW I S 4- I z w W J WITNESSES: INVE TORS dag @gw ATTORNEY (NoModel.) 2 Sheets-Sheet 2.

G. F. HOVEY & D. T. PERKINS.

AUTOMATIC MIXING GOVERNOR FOR HYDROGARBON GAS MACHINES.

No. 304,199. Patented Aug. 26, 1884.

I fly J WITNESSES: I VENTORS ATTORNEY UNITE STATES ATENT Trice.

CHARLES F. HOVEY AND DUANE T. PERKINS, OF SPRINGFIELD, MASS.

AUTOMATIC MIXING-GOVERNOR FOR HYDROCARBON-GAS MACHINES.

SPECIFICATION forming part of Letters Patent 110304199, dated August 26,1884.

Application filed December 5, 1883: (No model.)

To aZZ whomit may concern:

Be it known that we, CHARLES F. HovEY and DUANE T. PERKINS, citizens ofthe United States, residing at Springfield, in the county of Hampden andState of Massachusetts, have jointly invented. new and usefulImprovements in Automatic Mixing-Governors for Hydrocarbon-Gas Machines,of which the following is a specification.

This invention relates to improvements in apparatus to operate inconnection with hydrocarbon-gas machines, for properly mixing gas andair to obtain an illuminating-gas of proper density, the object being toprovide deviccswhich govern the flow of gas and air from theirrespective sources into the main conduit from which the burners aresupplied, which operate automatically, influenced by the quality of thecombined gas and air which flows in said conduit, to increase ordiminish the proportions thereof, according to the richness or lightingquality of the same.

In the drawings forming part of this specification, Figure 1 is a sideelevation, partlyin section, of a gas and air mixing or governingapparatus embodying ourimprovements. Fig. 2 is a section of themixing-chamber on line y y, Fig. 3. Fig. 3 is a plan view, partly insection. The line w m, Fig. 3, shows the section1ine of Fig. 1.

In devices heretofore employed it has been necessary to open more orless the gas or air supply pipes connected with hydrocarbon-gasmachines, according to the appearance of the flame at the burners,whichindicates that the gas is too rich or otherwise, or to depend upon thevarying gravity of the mixed gas and air to act in raising or loweringthe gas-holder, and through such movement of the latter to have-valvesoperated to admit more or less air or gas. \Ve have discovered, however,that a varying quality of gas develops more or less heat by combustion,the richer gas giving out more, and the operation of our devices isbased upon such varying heat-developing qualities of the gas whenpassing to the burners or into the gas-holder.

In the drawings, A is a mixing box or chest, into which lead twoinduction-pipes, f and g-one for gas and one for air-flowing in thedirection indicated by the arrows, forced by means Well known inconnection with the aforesaid gas-machines. Apipe, a, carries the mixedgas and air from the box A to a gasholder or to the burners.

A gas-burner, m, is placed in the top of box A, and is arranged tomaintain a flame by burning the mixed gas and air from within thelatter.

A metallic tube, 0, is secured on box A over the burner m, havingsuitable perforations z therein to admit air enough to support the saidgas-flame. An opening capable of being closed may be made in'the side ofpipe 0 for lighting burner m,- or the tube 0 may be removed for thatpurpose. The upper end of tube 0 is provided with a bearing-point, t, asshown. Three lever-posts, h i J, are set on the box A.

To .the upper end of post it a lever, 22, is hung,which rests on thebearing-point t on the end of tube 0.

To the posts i and J a series of compound levers, x :0 0c, is hung, andbelow the latter to' post i is hung another lever, 11. Leverso and o areconnected through said series of levers x and the links 20 w w 10,whereby any movement of the end of lever o,which is connected with theupper lever, 00, is much multiplied at the outer end of lever 12.

A shaft, B, is hung in box A, as shown, one end extending through oneend of the box, and having secured thereto an arm,K. Two arms, 0 c, aresecured on shaft 13 within box A, to each of which is hung a valve, 0,by the short connecting-link d. The end of the box through which shaft Bpasses is provided with an ordinary stuffing-box to prevent the escapeof gas around the shaft- The end of the arm K on .the end of shaft B isconnected with lever o by the rod D, the upper end of which is screwed,and has two nuts, 1 r, on it, whereby the rod may be adjusted up anddown to turn shaft Bslightly for the purpose of setting valves 6 toproper heights above the gas and air inlets f and gat the bottom of boxA, whereby the proper standard quality or proportions of gas and air areadmitted to the box.

It is obvious that the valve in box A in the end of the gas-passage maybe dispensed with,

and the valve in the air-passage only be left to be operated by shaft B;but the proportionate supply of gas and air would not be so wellgoverned as by the employment of the two valves 0 e.

The operation of our improvements is as follows: Air and gas are allowedto flow into the box A and out at pipe at. The burner m is then lightedand the quality of the gas is observed at some convenient burner. Thetube 0 meanwhile has expanded by the heat of the burner-flame within it,and, forcing lever 12 upward,has, through the above-described con1-pound-lever connections, rocked shaft B more or less and carried thevalves 0 to ceriain positions over the induction-pipes f and g. If, now,the light is found satisfactory, the valves need no further adjustment;but if otherwise they are adjusted by turning nuts r r 011 rod D, asdescribed. If the gas becomes less rich, the heat within tube 0decreases and the latter contracts, causing shaft, B to rock, and,lowering oneof valves 6 and raising the other, reduce the opening of theair-passage and increase that of the gas-passage, and a too rich qualityof gas will generate more heat in tube 0 and produce the oppositemovement of valves 0. Thus the flow of certain proportions of gas andair into box A is governed by the greater or less heat of said mixedelements, acting, while being burned, upon metal to expand it or toallow it to contract, and thereby operate governing-valves, as setforth.

Vhat we claim as our invention is 1. In a gas-andair-mixin g machine, areceiving-box, substantially as described, provided with suitableinduction and eduction pipes, agoverning valve or valves to vary thesize of the induction-openings in said box, a gasburner receiving andconsuming gas from the latter, an expansible metallic element,substantially as described, located in proximity to the flame of saidgas-burner, a series of levers, substantially as described, connectedwith the receiving-box, one of which rests upon said expansible metallicelement, and means, substantially as described, for connecting saidlevers with the said governing valve or valves, whereby the expanding orcontracting movement of said metallic element is imparted to saidvalves, combined and operating substantially as set forth.

2. A receiving-box provided with induction and eduction pipes, and avalve or valves for varying the openings of the cduction-pipes,substantially as described, a rock-shaft fitted in said box andconnected with said valves, an expansible metallic tube secured on saidbox, having within it a gas-burner fed with gas from said box, andmeans, substantially as de scribed, connecting said tube and rock-shaft,whereby the expanding and contracting movements of the tube are impartedto the rockshaft, combined and operating substantially as set forth.

3. I11 combination, the box A, provided with the induction and eductionopenings f, g, and a, the rock shaft 13, valves 6 e, a series ofcompound levers, substantially as described, connected with saidrock-shaft by the arm K, the tube 0, and the gas-burner m, substantiallyas set forth.

CHARLES F. HOVEY. DUANE T. PERKINS.

\Vitnesses:

H. A. CHAPIN, J. l). GARFIELD.

